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1.
甘露寡糖是从酵母细胞壁中提取的葡糖甘露聚糖蛋白复合体,其广泛存在于多种植物及多种微生物细胞壁内。目前的研究表明:在饲料中添加甘露寡糖可提高动物的免疫机能和生产性能。本文通过对甘露寡糖的作用机制、目前在动物生产中的应用状况及应用前景进行论述,旨在探讨甘露寡糖作为抗生素的替代品的途径和应有效果。 相似文献
2.
甘露寡糖是一种新型饲料添加剂。大量研究表明,甘露寡糖在改善动物肠道微生态、提高动物免疫力、促进动物生长等方面具有明显作用。然而有关甘露寡糖在反刍动物上的研究较少,主要对甘露寡糖在反刍动物生产上的研究进展作一介绍。 相似文献
3.
甘露寡糖是一种新型绿色饲料添加剂,不仅可以调节动物胃肠道环境,增强动物免疫力,而且可以改善畜禽生产性能。有关研究表明,甘露寡糖在提高家禽及幼龄动物日增重及饲料转化率、降低死亡率、增强动物免疫力等方面有明显作用。本试验通过在日粮中添加不同比例(对照组,0.05%、0.10%、0.15%)的甘露寡糖对白羽肉仔鸡的日粮养分代谢率的影响进行分析,结果表明:添加0.05%的甘露寡糖对肉仔鸡代谢中CP的表观消化率产生显著的差异(P<0.05),其它的代谢养分DM、OM、Ca、P的表观代谢率没产生显著差异。 相似文献
4.
甘露寡糖作为替代抗生素的一种饲料添加剂,具有广阔的应用前景。甘露寡糖能够维持动物肠道微生物区系的平衡,增强动物的免疫力,提高动物的生产性能。概述了甘露寡糖的生理功能及在家兔生产中的应用,提出了当今应用中存在的问题,并对今后甘露寡糖的开发利用进行了展望。 相似文献
5.
甘露寡糖作为饲料添加剂,可以提高动物的生产性能、改善动物肠道消化环境,还可以提高动物的肠道黏膜免疫功能,较为广泛地应用在动物生产中。综述了甘露寡糖在动物体内的作用机制,并阐述其在家畜、家禽以及水产动物生产中的应用。 相似文献
6.
甘露寡糖是一种从酵母细胞壁中提取的磷酸化的葡萄糖甘露寡糖蛋白质复合物，俗称甘寡糖。甘露寡糖可以通过对病原微生物的识别、黏附和排除作用来调节非免疫防御系统，可结合肠黏膜上皮细胞受体，竞争性排除病原微生物，打断病原菌附着一繁殖一致病的途径，使病原菌排出体外，保护动物健康；而且，甘露寡糖可以改善饲料效率，提高饲料转化率，促进营养物质的消化吸收，提高动物的生产性能， 相似文献
7.
甘露寡糖(MOS)可促进有益菌群增殖、抑制肠道病原菌、降低胃肠道疾病的发生率,提高动物日增重及饲料转化率,降低死亡率,增强动物免疫力,并能在较大程度上取代抗生素。本文综述甘露寡糖的特性及其在反刍动物生产中的应用和作用效果的影响因素等。 相似文献
8.
甘露寡糖(MOS)是一种新型饲料添加剂,它进入肠道后段可作为营养物质被动物肠道内固定的有益菌消化利用,从而使有益菌大量增生,起到了有益菌增殖因子的作用.同时低聚糖产生的酸性物质可降低整个肠道pH值,从而抑制了有害菌(如沙门氏菌等)生长,提高动物的抗病能力.大量研究表明,甘露寡糖在提高家禽及幼龄动物的日增重及饲料转化率、降低死亡率、增强动物的免疫力方面有着明显作用. 相似文献
9.
抗生素的使用在一定程度上解决了水产动物患病的问题,但会使病原体产生耐药性,且容易富集在水产动物体内,对人类健康产生危害。功能性寡糖作为安全环保的饲料添加剂对水产动物具有促生长、改善肠道健康、提高免疫功能等作用,有望成为抗生素的替代品之一。本文对甘露寡糖、壳寡糖、果寡糖、木寡糖等的功能及其在水产动物饲料中的应用研究进展进行综述。
[关键词] 寡糖|水产动物|饲料|生长性能|肠道微生物|免疫 相似文献
10.
技术成果：本成果来源国家“863”高技术课题，该技术提供一种高活性的甘露聚糖酶，及其高密度发酵生产方法，以及含有该甘露聚糖酶的动物饲料。重组酵母中甘露聚糖酶的表达量达到200000U／mL发酵液，比现有甘露聚糖酶的产量高，生产成本低。此甘露聚糖酶用于制备甘露寡糖，制备的甘露寡糖用于动物饲料。 相似文献
11.
In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario. Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously. 相似文献
13.
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%). Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada. 相似文献
14.
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%). 相似文献
15.
In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection. 相似文献
17.
In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium. 相似文献
18.
In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated. Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively. 相似文献
19.
In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%). 相似文献
20.
In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%). Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada. 相似文献
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